This NEW free to attend webinar / Hopin mini-event seeks to present the very latest in terms of N Nitrosamines, tracking the evolution of the issue through the regulations as well as looking at specific risk factors and the scientific investigations currently being undertaken to both better understand and contextualize the range of potential risk factors. Trying, where possible, to tease out what is risk and what is not. In parallel, it simultaneously looked at the latest advances in technology to support both research and risk assessment.
In case you missed the presentation by (@AndyTeasdale) Dr. Teasdale, please find below the presentation deck that he kindly shared. As soon as we have more information on the recordings, I will share it here.
Thank you for sharing, @Naiffer_Host. I enjoyed this excellent webinar.
I’m interested in the purge calculation of NDMA in the Metformin synthesis. And I have no idea why a trace amount of NDMA includes in the crude mixture. Did water bring the nitrosating agent? Or does DMA Hydrochloride originally contain NDMA? Please teach me, @AndyTeasdale.
Anyway, NDMA from this cause does not look serious concern. It’s helpful to understand the practical purge of NDMA and DMA. It is fantastic!!
Actually Mr. Teasdale answered this question in the Q&A session. It was well not 100% sure, but it seems DMA comes with traces of NDMA. Content of Nitrite in purified water/ process water is negligible and not enough to form the quantities of NDMA seen in Metformin AI.
In any case, maybe I am forgetting something. But I hope this helps you.
Thank you for sharing helpful information, @Diego_HM. I missed the Q&A session. And DMA hydrochloride seems to include NDMA at the level of control limit, according to the upper slide on my post. It’s interesting!!
And we should be careful to use DMA hydrochloride.
Adding @schlinjo1975 to the discussion, because this study is based on the work he lead. I found extremely insightful the side-by-side comparison of the experimental work with the purging calculations. I am really hoping this parallel study is published with the same level of details that Joerg et al put in the original publication.
Here is the post about that article just for reference:
“NDMA in the system may not be formed from DMA during the synthesis process but rather introduced by the starting material DMA HCl and gradually enriched in the recycled solvents” From 3.1 Results and discussion / Depletion of NDMA introduced during API manufacturing by double crystallization